15961271 has 4 divisors (see below), whose sum is σ = 15970944. Its totient is φ = 15951600.

The previous prime is 15961261. The next prime is 15961277. The reversal of 15961271 is 17216951.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15961271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15961277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670 + ... + 5891.

It is an arithmetic number, because the mean of its divisors is an integer number (3992736).

Almost surely, 2^15961271 is an apocalyptic number.

15961271 is a deficient number, since it is larger than the sum of its proper divisors (9673).

15961271 is an equidigital number, since it uses as much as digits as its factorization.

15961271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9672.

The product of its digits is 3780, while the sum is 32.

The square root of 15961271 is about 3995.1559418876. The cubic root of 15961271 is about 251.7807312031.

The spelling of 15961271 in words is "fifteen million, nine hundred sixty-one thousand, two hundred seventy-one".